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| Number | Title | Issue Date |
| 5096598 | Pressurized purging of a liquid drain for a vacuum system The present invention is directed to an improved purging of a liquid drain system for a liquid separator used in a moisture laden process vacuum system wherein the liquid separated from the flow stream by the separator is collected in an accumulator which... | 03/17/1992 |
| 5094757 | Radiator cooling system cleaner/refiner A system for cleaning radiator systems waste coolant, including a filter, a flush tank refinery, a source of cleansing chemical, a pump to circulate radiator coolant from the vehicle through the cleaning system back to the vehicle, a quick-connect conduit... | 03/10/1992 |
| 5089143 | Method of filtering industrial liquids and apparatus therefor In the method and apparatus for filtering industrial processing liquids including feeding unfiltered liquids into a tank, guidably movably supporting and immersing portions of a continuous conveyor screen within the tank, positioning a filter media upon a... | 02/18/1992 |
| 5089140 | Comprehensive water treatment system In its broadest aspects, a method for the cyclic regeneration of a water softening system is disclosed. The water softening system comprises an exchange medium in a tank which is in fluid communication with a brine storage tank. This method comprises the ... | 02/18/1992 |
| 5066386 | Extraction of oil from stable oil-water emulsions The present invention provides a facile method of oil removal from an oil-water emulsion containing suspended solid particulates. In general, the method utilizes a volatile solvent which is liquefied under pressure and forms a two-phase system when in con... | 11/19/1991 |
| 5055203 | Blood collection device with reduced serum dispensing volume and integral needle An integrated blood collection, separation and dispensing device is disclosed that allows a method of blood collection, serum separation and serum dispensing to occur using a single device (other than a centrifuge). The device preferably includes a transf... | 10/08/1991 |
| 5053141 | Procedure and means for filtering, cleaning and homogenizing liquid substances using ultrasonics A procedure and means for filtering and homogenizing liquid substances and for automatic cleaning of the filters. In the procedure are utilized an ultrasonic generator (4) connected in conjunction with the filter unit (1; 2) and ultrasonic oscillators (1.... | 10/01/1991 |
| 5032288 | Blood collection method A method of use is disclosed of a device that causes phase separation of whole blood, using much lower centrifugal forces. As a result, leukocytes are separated from blood cells having specific gravities of 1.09 g/ml or higher. The method preferably uses ... | 07/16/1991 |
| 5013457 | Pressurized backwash filter A liquid filtering and backwashing apparatus is disclosed comprising a pressurized filter tank having a first outlet valve and a filter cell disposed within the filter tank. The filter cell includes a conduit and an outer member with the outer member spac... | 05/07/1991 |
| 5011607 | Hemodiafiltration system A hemodiafiltration system which enables concurrent performance, in a single system, of hemodialysis and hemofiltration includes a dialyzer, consisting of a casing and at least one semipermeable membrane accommodated therein for dialyzing and purifying bo... | 04/30/1991 |
| 5006265 | Filter apparatus and method for removing solids from fluids The invention is a filter apparatus and method for separating suspended solids from fluids, particularly liquids. A filter chamber is defined inside a filter housing. Inside the chamber is a filter bundle, consisting of two or more filter screens, of a no... | 04/09/1991 |
| 5006264 | Apparatuses and methods for liquid-undissolved-solids separation Liquid purification apparatuses and methods; an open filtration, treatment and siphon apparatus and process; a porous mass formation apparatus and process; and a liquid-solid separation apparatus and a process using a siphon member. In one embodiment, a l... | 04/09/1991 |
| 5004548 | Method and apparatus for rinsing and priming an exchanger A method and apparatus for rinsing and priming an exchanger divided into first and second compartments by a semi-permeable membrane, the first compartment intended for circulating blood to be treated and the second compartment intended for circulating a p... | 04/02/1991 |
| 4997575 | Filtering centrifuge In a filter centrifuge with a filter medium, a filter cake is formed following the introduction of a suspension. In a first filtration phase the suspension is exposed to centrifugal filtration a first filtration which dewaters by the inertia forces. In a ... | 03/05/1991 |
| 4986919 | Chromatographic pumping method To provide smooth constant flow from a pump, a chromatographic system comprises: a chromatographic column having an inlet; a pump for supplying fluid to the inlet of the chromatographic column; a power means for the pump motor; positive and negative feedb... | 01/22/1991 |
| 4971704 | System for purifying engine lubricating oil Engine lubricating oil is removed from the engine sump, passed through a strainer and pumped at superatmospheric pressure through a heater to raise the temperature to 150°-180° F., a portion of the heated pressurized oil is passed through a filter and t... | 11/20/1990 |
| 4970004 | Vibrating sieve filter A vibrating sieving unit for insertion into a housing to form a sieving filter. The sieving unit can be inserted into an installed casing of a filter unit by the use of a manifold plate. The vibrator directly vibrates the sieving cylinder reducing the bui... | 11/13/1990 |
| 4968432 | Treatment of liquid including blood components A method of removing a constituent of a biological fluid including a blood component, said method including flowing the biological fluid past one side of a first semipermeable membrane; flowing solution containing a first precipitation agent past a second... | 11/06/1990 |
| 4952325 | Apparatus and method for cleaning filtered accumulation from an annular filter Cylindrical textile filters of the radially outward filtration flow type such as utilized in textile wet processing systems are cleaned of filtered accumulation in an inclined filter housing wherein the filter is continuously rotated while a spray nozzle ... | 08/28/1990 |
| 4946599 | Apparatus and method for converting bottled water dispensers to continuous supply systems Apparatus and methods for converting a bottled water dispenser for use with a continuous source of water are disclosed. In a preferred embodiment, means for reducing the pressure and filtering the continuous source of water are provided. In a most preferr... | 08/07/1990 |
| 4929363 | Method for filtering a fluid A method for filtering a fluid in a filter system, including a filter housing and a filter element, which method comprises modifying filter throughput in such a way that differential pressure across the filter system caused by build-up of filter cake is s... | 05/29/1990 |
| 4925570 | Method of filtering Filter pads, which are made inherently stable by binders and by removal of the binders can be converted in packings to be maintained under substantially constant surface pressure between rigid filter brackets, are produced first as molded bodies from a su... | 05/15/1990 |
| 4923068 | Automatic filter system A method and apparatus for automatically propelling a charge of backwash fluid by a compressed gas such as steam to backwash a filter in a filter pair. The method and apparatus provides for backwashing a filter with at least three backwash phases, a first... | 05/08/1990 |
| 4904395 | Method and apparatus for thickening fiber suspension The present invention relates to a method and an apparatus for thickening of fiber suspension. In particular, the invention relates to removal of water from pulp which is caused to thicken in a closed space equipped with a fine-perforated or fine-slotted ... | 02/27/1990 |
| 4904389 | Process for the separation of dicarboxylic acids A process for separation of multicomponent mixtures of dicarboxylic acids, especially, mixtures of C8 -C24 saturated and unsaturated acids is derived from a fermentation process, in which an aqueous feed solution containing the mixtu... | 02/27/1990 |
| 4898672 | Oxygen controlling wastewater treatment method A method of treating wastewater using an aeration tank of the type having an interior divided into at least a first chamber and a last chamber with each of the chambers having a lower portion and an upper portion and having liquid passageways in the lower... | 02/06/1990 |
| 4898678 | Heavy-metal separator for drinking water An apparatus and method of removing lead contaminants from drinking water wherein the apparatus includes a first lead-separator tank which receives water from an incoming line. Lead particles are allowed to settle to the bottom of the first separator tank... | 02/06/1990 |
| 4895666 | Centrifuge with two withdrawal chambers A centrifuge apparatus and a method of filtration are described. The centrifuge has radial and lateral filtration surfaces and separate discharge chambers for each. The lateral filter is located at an imperforate radial distance from the radial filter. Th... | 01/23/1990 |
| 4882781 | Method for predicting steady-state conditions To stablize flow rate in a single-stroke, syringe-type high pressure pump to a constant value after turn-on, a control system: (1) in one embodiment, the control system senses the maximum rate of change of pressure, detects a pressure when the rate of cha... | 11/21/1989 |
| 4861494 | Automatic cycle control arrangement and method for a pressure filter A pressurized filter is disclosed of the type including a filter media layer disposed in a filter chamber which is pressurized with a feed layer to cause filtering flow therethrough, and a diaphragm in the chamber operated to dewater the chamber after eac... | 08/29/1989 |
| 4855062 | Apparatus and process for regulating a filter plate contact pressure in filter presses In order to regulate the filter plate contact pressure in a plate filter press comprising a hydraulic closing cylinder unit, the compression force prevailing in the filter plate pack, or the compression of at least one component such as, for example, a fi... | 08/08/1989 |
| 4849113 | Continuous polymer filter An improved continuous polymer filter of the screen belt type employs a valve arrangement to selectively apportion the extruder output flow through at least two filter paths. In the neutral valve position both filter paths receive polymer at equal flow ra... | 07/18/1989 |
| 4844812 | Pumped hydrocyclone backpressure control A method and related system are disclosed for controlling the operation of a fixed rate pumped hydrocyclone liquid separation unit to maintain a desired back-pressure therein. A pressure control valve and a liquid level control valve are connected to a se... | 07/04/1989 |
| 4842750 | Apparatus for cleaning viscous materials The invention relates to an apparatus for cleaning viscous materials, more particularly melted down scrap synthetic materials in a recycling process. The apparatus of the invention comprises a cleaning screen in the form of a strip which can be moved at r... | 06/27/1989 |
| 4834888 | Hemodialysis apparatus comprising a sterile filter A hemodialysis apparatus includes a sterile filter whose outlet, which is usually closed, is connected to a line leading to a discharge outlet in wherein a bypass valve is employed which can be opened at predetermined intervals both during treatment and d... | 05/30/1989 |
| 4832882 | Method of removing impurities from a material A waste recovery method for producing essentially pure thermoplastic material from waste thermoplastic material containing impurities is disclosed to be comprised of an extruder, primary and secondary filtes, and a pelletizer. In addition, a plurality of ... | 05/23/1989 |
| 4828717 | Device and method for reducing volume of aqueous waste effluents The device for reducing the volume of an aqueous waste effluent includes a holding tank, a heating tank for receiving waste effluent from the holding tank and including a heater for heating the waste effluent to a predetermined temperature which is below ... | 05/09/1989 |
| 4808319 | Method for removing a slime deposit from packing material inside a tower Air stripping is a common technique used to remove organic impurities from water found in underground aquifers. When this technique is used, bacteria already present in the underground water, and bacteria and oxygen introduced into the water by the incomi... | 02/28/1989 |
| 4775481 | Apparatus and method for liquid chromatography To stabilize flow rate in a single-stroke, syringe-type high pressure pump at a constant value after turn-on, a control system increases the pump speed until equilibrium conditions are reached and then pumps at the present rate. In one embodiment, the sys... | 10/04/1988 |
| 4774002 | Liquid treatment such as dewatering of sludge A method of treating a liquid, for example dewatering a sludge by ultrafiltration, in which the liquid is caused to flow repeatedly along a permeable walled tube (22) so that a filtrate passes through the wall of the tube, the progress of the treatment be... | 09/27/1988 |
